Allenby is a surname of English origin and may refer to:
- Edmund Allenby, 1st Viscount Allenby (1861–1936), a British soldier
- Named for the above:
- Allenby Street, Tel Aviv, Israel
- Allenby Bridge between Jordan and Israel
- Allenby Square, name given in succession to two squares in Jerusalem
- Allenby Camp, site of a former British Army camp in Jerusalem
- Allenby Garden in Beersheba
- Foch-Allenby, neighborhood in Beirut Central District
- Allenby, British Columbia, Canada (adjacent Allenby Lake was named for the town, not Lord Allenby)
- Braden Allenby, an environmental scientist
- Allenby Beardsley, a fictional character from G Gundam
A common variant is "Allanby"
- Nick Allanby, Australian cricketer
- Richard Allanby, Australian cricketer